The Alstom TUG 0110 (Part Number 03820042) is a specialized “Tropic” series voltage monitoring relay designed for high-reliability DC voltage supervision in demanding environmental conditions within power plants and industrial electrical substations.

Product Parameters (Datasheet)
- Model Number: TUG 0110
- Part Number: 03820042
- Type: Tropic Voltage Relay
- Rated Voltage: 110V DC
- Operating Range: Typically 80% to 120% of rated voltage
- Relay Version: Tropic (Enhanced humidity and temperature resistance)
- Contact Type: High-capacity changeover contacts for signaling and tripping
- Mounting: Standard plug-in base or panel mounting compatibility
- Reset Type: Automatic or manual (depending on internal configuration)
- Housing: Robust dust-proof and moisture-resistant casing
Country of Origin
This precision protective component is manufactured by Alstom (now often integrated into GE Renewable Energy or Grid Solutions), with its design and manufacturing heritage originating from France.
Application Fields
The TUG 0110 relay is engineered for critical supervision tasks in:
- Power Distribution: Monitoring battery bank voltages in 110V DC control circuits.
- Rail Infrastructure: Supervizing signaling and traction control power supplies.
- Oil & Gas Refineries: Providing overvoltage/undervoltage protection in hazardous area control rooms.
- Tropical/Maritime Environments: Specifically used where high humidity and salt air require specialized “Tropic” grade components.
Product Usage Instructions
- Installation: Ensure the relay is seated firmly in its compatible base. For “Tropic” models, verify that cable entry points are sealed to maintain environmental protection.
- Voltage Connection: Connect the 110V DC monitoring source to the designated input terminals, ensuring correct polarity.
- Threshold Setting: Adjust the voltage trip and reset levels using the internal potentiometers or dials as specified in the technical manual.
- Wiring Contacts: Integrate the output contacts into the alarm or circuit breaker trip loop.
- Testing: Perform a secondary injection test using a DC power source to confirm the relay trips accurately at the set threshold.
Product Technical Description
The Alstom TUG series is known for its “Tropic” treatment, which involves a specialized coating and material selection to prevent fungal growth and corrosion in humid climates. Technically, the TUG 0110 acts as a precision voltage comparator; it continuously measures the 110V DC rail and triggers a high-speed mechanical relay if the voltage deviates from the safe operating window. Its high MTBF (Mean Time Between Failures) makes it a preferred choice for unmanned substations.
Q&A (Common Questions)
Q: What does the “Tropic” designation mean for this Alstom relay? A: It indicates the relay has undergone specialized treatment to operate reliably in high-humidity, high-temperature, and corrosive atmospheres without performance degradation.
Q: Can this relay be used on AC voltage systems? A: No, the TUG 0110 is specifically designed for 110V DC circuits. Using it on AC may damage the internal sensing electronics.
Q: Is the TUG 0110 a direct replacement for older GEC or AREVA models? A: Yes, Alstom inherited these designs from GEC Alsthom and AREVA; the TUG 0110 is often the standard replacement for those legacy part numbers.
Q: Does this relay provide a visual indication of status? A: Most models include a mechanical flag or LED indicator to show whether the relay is in a tripped or healthy state.
Similar Model Recommendations
- Alstom TUG 0048 (48V DC version)
- Alstom TUG 0220 (220V DC version)
- Alstom TUA series (Time-delay voltage relay variant)
- Alstom MVAA (Auxiliary relay for trip circuits)
- Alstom MAVS (Standard AC/DC voltage monitoring relay)
For procurement and technical support regarding the Alstom TUG 0110 and other protection relay solutions, please explore our inventory.
